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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 225 (Audio, Visual & Navigation System (INFINITI INTOUCH) (Diagnostic Trouble Codes (DTCS) B1F10-U1725 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC U1259: Integral Switch Conn >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK INTEGRAL SWITCH POWER SUPPLY AND GROUND CIRCUIT

    Check integral switch power supply and ground circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace malfunctioning parts.

  2. CHECK AV COMMUNICATION CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect display control unit harness connector and integral switch harness connector.
    3. Check the continuity between display control unit harness connector and integral switch harness connector.
      Display control unit Integral switch Continuity
      Connector Terminal Connector Terminal
      M100 16 M1 3 Existed
      28 4

    Is the inspection result normal?

    YES 

    Replace integral switch. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace malfunctioning parts.

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